论文部分内容阅读
一、国外育种工作的动态最近,据美籍教授梁学礼反映,美国小麦的育种工作从五十年代起到现在,大致可分四个时期,或者说四个高潮:第一个时期是在五十年代的十年时间里,用物理、化学的办法人工引变,主要是辐射育种。在第一届国际小麦育种会议上,美国遗传学家R.Cadecott认为,辐射诱变要在一般的育种工作上应用还有困难,也就是不能定向,他认为,在搞抗病育种时,如果在所有亲本中都找不到抗病基因,通过辐射,诱发突变、可能产生新的抗病基
First, the dynamics of foreign breeding work Recently, according to the American professor Liangxue Li reflects the United States wheat breeding work from the 1950s up to now, can be divided into four periods, or four orgasms: the first period is fifty Years of the decade, with physical, chemical methods artificial change, mainly radiation breeding. At the first International Wheat Breeding Conference, R.Cadecott, a U.S. geneticist, believes that there is still some difficulty in using radiation mutagenesis in general breeding work, that is, it can not be targeted. He believes that when engaging in disease-resistant breeding, if Disease-resistant genes can not be found in any of the parents, and new disease-resistant bases may be produced by radiation and mutation induction